Agonisers

Source: Codex: Dark Eldar (1998), p. 14

These are close combat weapons that affect a victim's nervous system, causing such severe pain that they can disable or kill even the largest opponent. They come in a wide variety of types, but the most common are whips and barbed gauntlets. All forms of agonisers work as follows: roll to hit as normal, but don't roll to wound. Instead hits cause 1 wound on a D6 roll of 4+ regardless of Strength/Toughness, and no armour saves are allowed (invulnerable saves may be taken as normal). Vehicles hit by an agoniser take a glancing hit on a D6 roll of 6, regardless of the vehicle's Armour value.